This is just for the record;
I got it to work with temporarily using a different network card.
The keyboard worked fine with 2.6.12 (from the netinst CD I used)

but the Intel 1000 NIC [Ethernet controller: Intel Corp.: Unknown device
109a (rev 01) ]
only started working when I used a newer kernel from backports.org
(2.6.15-SMP-EM64T)

Thanks for every bodies help
- Sebastian Haase
Andrew Preater wrote:

* Sebastian Haase <haase@msg.ucsf.edu> [2006-02-19 01:39]:

I just got a new Pentium D Dell PC and was very surprised when
it didn't respond on the first (choose language) screen of
debian-installer... It took me a while, but then I realized:
The PC was using a USB keyboard !

Strange, installation on my em64t PC worked fine with a USB
keyboard. Try enabling 'Legacy USB support' (or similar) in the
BIOS, this will make the machine emulate a PS/2 keyboard in place
of the USB one. You can switch it back after installation.

Also I'm anticipating that there will be problems with the
"Intel 1000(?) gigabit" network card ?